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What is Gypsum?

Jean Vachon, Mechasys
Posted by Jean Vachon, Mechasys on Aug 11, 2020 2:47:00 PM

 

Everyday you install gypsum boards, but do you know what it is made of? Well, it's basically plaster between two sheets of cardboard, and the plaster comes from the transformation of a soft, sedimentary rock (i.e. produced by the deposition of sediment in salt marshes) called… gypsum! This crystallized rock is found in abundance on our planet. According to its degree of purity, it can occur in spectacular structures, such as the giant crystals from the Naica mine in Mexico.

As early as Egyptian antiquity (3000 BC), gypsum was used to make mortars and plaster. As a result of its widespread use in construction, gypsum constitutes a significant portion of the construction, renovation and demolition (CRD) waste that ends up in landfills. However, it can be effectively recycled. Indeed, Because of its sulphur and calcium content, it can be used as an agricultural soil improver. It can also be used as a cementitious ingredient and of course in the manufacture of new panels.

CRD waste accounts for more than a third of all waste generated in Quebec (recent data does not seem to be available for the entire country of Canada). More than ever, the preservation of our environment calls for action by all, our health and that of our families depends on it. Construction waste can be reduced at the source and revalorized; eco-management of the construction site and cooperation of all workers will reduce waste. Think of measures such as just-in-time delivery of materials, the availability on site of containers dedicated to recovery. The FRAMR can be part of the solution, since it significantly reduces errors in the assembly of the walls and the waste generated by rework.

Let's not forget: "THE WASTE THAT POLLUTES THE LEAST IS THE WASTE THAT IS NOT PRODUCED."

 

Recycling centres for construction, renovation and demolition waste:

https://www.nwgypsum.com/

http://recyclegypse.com/

https://www.multirecyclage.com/

Additional sources of information:

https://www.voirvert.ca/nouvelles/rubriques/un-nouvel-outil-pour-favoriser-ecogestion-chantiers

https://batimentdurable.ca/fichiers/depot/ageco_ecpar_cbdcaqc_guideecogestion-avril-2019-affichageecran1.pdf

https://youtu.be/h6QE4FBucIE

Topics: construction, construction materials

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